package cn.tedu.filter;

import javax.servlet.*;
import javax.servlet.annotation.WebFilter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.io.IOException;

/**
 * <pre>
 *
 * </pre>
 *
 * @author restyhap
 * @since 2019-11-04 17:11
 */
@WebFilter ("*.user")
public class Filter1 implements Filter {
    @Override
    public void init(FilterConfig filterConfig) throws ServletException {
        System.out.println("Filter1... init()...");
    }

    @Override
    public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
        HttpServletRequest request = (HttpServletRequest) servletRequest;
        HttpServletResponse response = (HttpServletResponse) servletResponse;
        String str = request.getParameter("username");

        if(str.contains("admin")){
            request.getSession().setAttribute("msg","当前用户名包含admin,不允许注册");
            request.getRequestDispatcher("index.jsp").forward(request,response);
        }else{
            filterChain.doFilter(request,response);
        }

    }

    @Override
    public void destroy() {

    }
}
